Improvement in trusses for connecting booms to masts



@tutti @Wire JAMES E. TIBBETTS, OF TRE-NTON, JERSEY.

Letters .Patent No. 93,770, dated .August 17, 1869'.

IMPRQVEMENT IN TRUs'sns ron coNNEcTING Booms To MAsTs.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom, it may concern Be it known that I, J Mns E. TIBBET'rs, of Trenton, in the county of Mercer, and State of New J er-f sey, have invented a new and improved Truss for" Connecting Booms to Masts; and I do hereby declare that the following is a full, clear, and eXact'description thereof, which `will enable others skilled'in the alt to make and use the same, reference being had to the accompanying "drawing, forming part of this specification, in which- A Figure l is a side view of my improved device.

Figure 2 is a top view of the same.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish animproved device for connecting booms to thev masts of' vessels, which shall be simple in construction and safe in operation, and which will allow the boom to vbe conveniently/removed when desired; and

It consists in the construction and combination of the various parts of the device, as hereinafter more fully described.

A represents the mast, and B, the boom 4of avessel.

C is the truss, which is made in two semicircular parts, which are hinged to each other upon one side of the mast, and detachably'connected to each other at the other side of the mast by a bolt and nut, as shown in figs. 1 and 2.

Upon the middle of the part that passes around the rear side ofthe mast is formed au eye' to receivelthe Abolt D, which passes d'own through sai'd eye, and is secured in place by a nut, d1, screwed upon itslower end. The nut d1 is kept from being worked od by the movement of the boom, by a spring-key passed through a hole in the 'end of. the bolt D, below the said nut. The bolt D is formed with an L-shaped head, di, and with a circular ange, d3, to rest upon To the opposite'sides of the L-part of the' head d2, of

the bolt D, are pivot-ed the lower ends of the straps E, by a bolt which passes through thev said head of the-bolt D, and through the lower ends of the said straps E, as shown in the drawings. The straps E pass up along, and are securely bolted to the sides of the'lower end of the boom B. y

vThe boom B is thus connected with the mast A by a doubleejointed connection, giving perfect freedom to the said boom to move in any necessary direction.

A clevis may, if desired1 be attached to the head of the bolt I), for convenience in attachingthe inner corner of the sail.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

The improved device for connectin the mast-truss and boom-straps of a ship, formed by the combination of the shank of the bolt D, with an L-shaped head, d2, circular flange d, nut dl, and spring-key, all constructed and co-operating together, as and for the purpose specified.

JAMES E. TIBBETTS.

Witnesses J. V.A HU'roHINsoN, J oHN M. CnoUcH. 

